Electric heating and cooking apparatus



llllliH ELCTRIC HEATNG AND COOKING APPARATUS lllll l Q 13k Patented Slept. 22, 1925.

.Ennernie HEATING ,AND cocaine. Arranarus.

.Appvlicativon filed 1.Tune 6,.

To all whom z'tlmfzy/ condemn 1 'Se {itlrnown that; l, HnrNnroH entranti, a citizen ofthe (iermanRepublic, residing at Berlin, Germany, have `yinvented certain new andiiseful improvements in Electric lHeating and Cooking Apparatus, of which the following is a. specification.

The electric heating and cooking apparatus of commonly used construction possess the serious inconvenience that the connecting clamps are mounted on the same base plate as the heating bodies wherefrom results that when the apparatus is being used the joints between clamps and base plate suffer from the strong electric energy. It becomes impossible to loosen a screw which is screwed into the clamp, as is for instance the case when the heating bodies are removably fixed. The screw and the clamps are sometimes jammed so that the shaft of the screw will break off when the screw is being unscrewed.

A further inconvenience is that the heating bodies and the electric connections are easily soiled as the cover of the apparatus is not tiOht and overboiling liquid can filter between the rings, which are of the same profile as the rings commonly used on kitchen ranges, and drop onto the parts mentioned.

The invention has for its object to avoid these inconveniences by improving the profile of the rings on the top plate of the apparatus so that overboiling liquid fiows off without getting at the heating bodies owing to the steps formed by the improved profile of the rings. Contact columns are further fixed on a separate base plate by cementation, the heads of said columns projecting through apertures provided in a plate of refractory material so that the contacts or connection points are cooled by the circulating air against the heat radiating from the heating bodies.

An embodiment of the invention is shown by way of example on the accompanying drawing, in which Fig. 1 shows in elevation an electric heating or cooking apparatus.

Fig. 2 is a longitudinal section of Fig. 1.

Fig. 2 shows how the contact columns are fixed in the separate base plate.

Fig. 3 is a plan view of Fig. 1 partly broken away. f

1 is the wall of the electric heating or cooking apparatus and 2, 3, 4 and 5 are the .1,924- termino. 71151392.

emicentricyk rings which form .tl1e,top, plate.

f, ln the wall, 1 of the apparatusain inlet holes 6 are j arranged; l,The rings.,2,f 25,4,.,5 have yeach a downwardly ,tnrnedjlangejah,the

outer edge and an upwardly turned fiange at the inner edge. The concentric rings are thus not situated all in the same horizontal plane but form steps as shown in Figs. 1 and 2 so that overboiling liquid, instead of filtering through the joints between the concentric rings, as has been hitherto the case, flows olf on the outer stepped surface of the concentric rings without getting into the body of the apparatus. The wall 1 of the apparatus is lined on the inner surface with a layer 8 ofheat insulating material. In the body of the apparatus an upper plate 14 of refractory material is fixed which has apertures 7. This plate 14 is covered by a perforated protecting plate 13. The body 1 of the apparatus is mounted on a base plate 10 of refractory material which has holes 11 in which the wall screws 12 at the lower ends of the contact columns 9 are cemented. The heating bodies mounted on the upper ends of the contact columns 9 project into the holes 7 of the insulating top plate 14:. The perforated protecting plate 13 is removable and it serves to protect the heads of the contact columns against damage. The air fiowing in through the air holes 6 in the wall 1 ascends through the holes 7 so that burning of the contact columns 9 or heating bodies is prevented.

l claim 1. An electric heating and cooking apparatus comprising in combination a sheet metal casing having air inlet holes in its side wall, concentric rings forming the top plate of said casing, a downwardly turned flange at the outer edge of the three large rings, an upwardly turned flange at the inner edge of the three large rings and at the outer edge of the centre ring, a base plate of refractory material on which said casing is mounted said base plate having cavities, an upper plate of refractory material in said casing having an equal number of holes as said base plate has cavities, contact columns fixed in the cavities of said base plate, heating bodies on the top end of said contact columns projecting into the holes upon said upper plate of refractory material, and a perforated sheet metal protecting plate between said concentric rings and said upper plateof refractory material.

2. An electric heating and cooking apparatus comprising in combination a sheet metal casing having air inlet holes in its side wall7 concentric rings 'forming the top plate of said casing, a downwardly turned flange at the outer edge ot the three large rings7 an upwardly turned flange at the inner edge of the three large rings and at the outer edge of' the centre ring, a hase plate of refractory material on which said casing is mounted said base plate having cavities, an upper plate of refractory material in said casing having an equal number et holes as said hase plate has cavities, contact columns'7 a wall screw at the lower end ol each contact column .inserted in one of the cavities ot said hase plate and cemented in the saine, heating bodies on the top end of said contact columns projecting into the holes upon said upper plate of refractory material, and a perforated sheet metal protecting plate between said concentric rings and said upper plate o1". refractory material.

In testimony whereof I atlix my signature.

HEINRICH AUBANN 

